US1659750A - Concrete mixer and conveyer - Google Patents

Description

Feb. 21,1928. 1,659,750

J. STOLLINGS CONCRETE MIXER AND CONVEYER Filed Sept. 25. 1926 2 Sheets-Sheet 1 fiave'nzior.

JE Z SELL/4 6$ attorney.

Feb. 21, 1928. 1,659,750

J. L. STOLLINGS CONCRETE MiXER AND CONVEYER Filed Sept. 25. 1926 2 Sheets-Shet 2 Even tor. (258551 S'EAi/A/G Wgaim w i I afm'neg,

Patented Feb, 211,

uarran stares JESSE 1L. S'I'OLLINGS,.0F LOS B AZNOS, CAiLIFOBINIA.

oononn'rn MIXER AND CONVEYER.

Application filed September 25, 1926. Serial No. 137,768.

This invention relates to improvements in concrete mixers andconveyers and has par ticular reference to a concrete mixer adapted to be transported from place to place, particularly over a railroad track.

Another object of this invention is to provide a mechanism which will mix the materials placed therein during the period of travel from the point of filling to the point of discharge. 7

A further object is to produce'a device of this character which is simple in construction, easy to operate andone which may be manufactured at aminimum cost.

A further object is to produce a mixer which may. be employed in transporting large quantities of concrete a considerable distance, and to discharge the same without the employment of complicated machinery.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part'of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of my improved mixer,

Figure 2 is a top plan view of Figure 1, Figure 3 is an end elevation taken on the line 3-3 of Figure 2,

Figure 4 'is an end elevation taken from the opposite end to that shown in Figure 3, Figure 5 is a fragmentary detail view showing the water and air connection to the trunnion,

Figure 6 is a fragmentary detail View I showing the position of the flushing pipe in the mixing chamber, and

Figure 7 is a cross-section taken on the line 77 of FigureG. v

In the mixing of concrete, it has been common to mix the concrete at a distance and to convey the same to the point of use in a vehicle of the dumping type. In railroad work, and particularly in tunnel construction it has been common to mix the concrete, load the same upon fiat cars and haul it into the tunnel from which point it was placed in the forms. The result of this practise is that considerable time is lost in theconveying as well as the expense of holding the train up in the tunnel.

It is the object of my invention to place the raw materials in a mixing chamber and then to convey this mixing chamber to the point where the concrete is to be used and to cause the mixing of the raw materials during the period of conveyance.

I further propose to provide means where by the mixing chamber may be tilted when the point of delivery has been reached thereby allowing the material to fall by gravity from the chamber, after which time the mixing chamber may be returned for its next load.

In accomplishing this object, I employ a substantially rectangular frame 5 which is mounted upon wheels 6 and 7. In the pres ent instance, these wheels travel upon a railroad track 8. Positioned upon the frame 5 are journal blocks 9 and 11 which carry trunnions 12 and 13. which trunnions are secured to'a frame 14, which frame is substantially rectangular in shape and within which is journaled a mixing chamber 16.

At 17 and 18 I have shown bearings which support stub shafts connected to the ends of the mixing chamber 16. This construction permits the mixing chamber 16 to be rotated within the rectangular frame 14.

In order to accomplish this rotat.ion, I have provided a gear 19 upon .the outer circumference of the mixing chamber. This gear meshes with a gear 21 freely rotatable upon a shaft 22 supported below the rectangular frame 5.

A clutch is shown at 23 which clutch is keyed to the shaft 22 and may be moved through the medium of a handle 24 moving over a quadrant 26.

A gear 27 mounted, upon the shaft 22 meshes with a gear 28 carried upon the axle 29. which axle rotates with the wheels 6.

Entrance to the chamber 16 is gained through a hatch 31, while a similar hatch 32 provided at the opposite end of the mixing chamber provides means for emptying the same. these hatches may be sealed while the mixing operation is in progress.

- At 33 I have shown an elevating cylinder pivoted in bearings '34 and 36 carried upon a supplemental frame 37 secured to the frame 5. A piston within the cylinder 33 is connectedto a piston rod 38 which is in turn pivoted as at 39 to the bearings 18.

Referring now to Figure 5, it will be noted that a pipe is indicatedat 41 which pipe is connected to a yoke 42 and that a three-way valve 43 is positioned within theyoke.

It is of course understood that i Pipes 44 and 46 extend from the yoke 42 Q and enter the bearing 18. Ports 47 and 48,

respectively, connect with annular grooves b'ottomof the mixing shaft 16 and is perforated so that fluid discharged therein will be discharged therefrom in jets as indicated by the arrows in Figure 7, while the pipe 54 extends upwardly and ends in a nozzle-like aperture.

The result of this construction is that concrete materials may be placed within the mixing chamber by introducing the same through the hatch 31, after which water is introduced through the pipe 4l,'discharged through the pipe 55 or the pipe 54 until suffivcient water is in the batch to make a strong mixture.

Assuming now that the. frame having my device connected thereto proceeds to the point'where the concrete is to be used the operation will be as follows Assuming that the handle 24 has been moved so that the clutch 23 causes the gear 21 to revolve theresult will be that the mix ing chamber 16 will be rotated as long as the wheels 6 are in motion. Should the distance be great, it may be possible that the handle 24 will be disengaged throughout a portion of the travel of the frame. When arriving at the point of discharge, the hatch 32 will be opened after which air will be admitted to the cylinder 33 at a point below the piston positioned therein, with the result that the entire mixing chamber and frame 14 will be elevzitedto the dotted line position of Figure When the chamber has reached the elevated position, the three-way valve 43 will be turned in such a manner as to admit compressed air from the train line or any other suitable source of supply, into the pipe 54. This compressed air will serve to discharge the mixture within the chamber andshould it be desired to flush the chamber, the valve 43' may be turned to that position which will discharge the water through the pipe 41 into the pipe thereby flushing the entire interior of thetank.

It will thus be seen that I have devised a concrete mixer and conveyor which will minimize the amount of labor now employed in the mixing and conveying of concrete, particularly in railroad work.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material, size, shape and arrangement ofparts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described my invention, I claim In a concrete mixer, the combination with a frame, a rotary mixing chamber positioned within said frame, trunnions carried on said mixing chamber, bearings positioned on said frame and adapted to receive said trunnions, ports formed in said bearings, grooves formed in one of said trunnions and in com munication with said ports, pipes communicating with said grooves, one of the said pipes extending to a point within the upper portion ofsaid mixing chamber, the other of said pipes extending to a point parallel with the bottom of said mixing chamber for the purpose specified.

. In testimony whereof I afiix my signature.

JESSE L. STOLLINGS.

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